BACKGROUND:The Koopa Troopas sent a large group of Gloombas to the Mushroom Kingdom. But a storm came and the Gloombas found safety in the sewers. After the storm dissapeared the Gloombas didn't go up to the surface. They stayed in the sewers and made it their home.
Gloomba is a cocky type. It lives in the sewers because it is dark and it can hide in the shadows and in the pipes.